Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on the Performance of a Cross-Flow-Type, Indirect Evaporative Cooler Made of Paper/Plastic Film

종이와 플라스틱 필름의 이종 재질로 구성된 직교류형 간접증발소자의 성능에 대한 실험적 연구

  • Kwon, Mi-Hye (Division of Mechanical System Engineering, Incheon National University) ;
  • Go, Min-Geon (Division of Mechanical System Engineering, Incheon National University) ;
  • Kim, Nae-Hyun (Division of Mechanical System Engineering, Incheon National University)
  • 권미혜 (인천대학교 기계시스템공학부) ;
  • 고민건 (인천대학교 기계시스템공학부) ;
  • 김내현 (인천대학교 기계시스템공학부)
  • Received : 2015.05.19
  • Accepted : 2015.08.04
  • Published : 2015.09.10
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Abstract

In Korea, a typically hot and humid summer means that air-conditioners consume a large quantity of electricity; accordingly, the simultaneous usage of an indirect evaporative cooler may reduce the sensible-heat level and save the amount of electricity that is consumed. In this study, the heat-transfer and pressure-drop characteristics of an indirect evaporative cooler made of paper/plastic film were investigated under both dry and wet conditions; for the purpose of comparison, an indirect evaporative cooler made of plastic film was also tested. Our results show that the indirect evaporative efficiencies under a wet condition are greater than those under a dry condition, and the efficiencies of the paper/plastic sample (109% to 138%) are greater than those (67% to 89%) of the plastic sample; in addition, the wet-surface, indirect evaporative efficiencies of the paper/plastic sample are 32% to 36% greater than those of the plastic sample. Further, the wet-surface pressure drops of the paper/plastic sample are 13% to 23% larger than those of the plastic sample, and this might have been caused by the surface roughness of the samples. A rigorous heat-transfer analysis revealed that, for the plastic sample, 30% to 37% of the wet channels remained dry, whereas all of the channels were wet for the paper/plastic sample.

Keywords

References

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